Professor, joint with Physics and Astronomy

Co-Director of the Northwestern Synchrotron Research Center

BS, physics and mathematics, 1973 State University of New York at Brockport
PhD, physics, 1982 State University of New York at Albany

Contact Info

Bedzyk Research Group

 

X-ray scattering and spectroscopy of interface structures

We develop novel X-ray probes for atomic-scale characterization of surfaces, interfaces, ultra-thin-films and nanostructures. In addition to using an in-house X-ray lab, we make extensive use of synchrotron X-ray facilities, where there is greatly enhanced chemical and structural sensitivity for studying systems as dilute as one-hundredth of an atomic monolayer.

We employ various conventional X-ray scattering and spectroscopy techniques, and have developed a number of novel methods for generating X-ray standing waves with differing characteristic length scales. These periodic X-ray probes are used to pinpoint the lattice location of adsorbate atoms on crystalline surfaces, to measure strain within epitaxially grown semiconductor and ferroelectric thin films, to locate heavy atoms within ordered ultrathin organic films, and to study polyion adsorption at charged liquid/solid interfaces.

Associations and Awards

Fellow, American Physical Society, 1998

Bertram Eugene Warren Diffraction Physics Award, American Crystallographic Association, 1994

Management Board for DuPont-Northwestern-Dow- Collaborative Access Team (DND-CAT) at the Advanced Photon Source

Director of the X-ray Diffraction Facility at NU

Visiting research scientist, Argonne National Laboratory

Professor of Physics and Astronomy (Joint Courtesy Appointment)

Selected Recent Publications

"The Controlled Evolution of a Polymer Single Crystal, X. Liu, Y.  Zhang, D. K. Goswami, J.S. Okasinski, K. Salaita, P. Sun, M.J. Bedzyk, C.A. Mirkin, Science 307, 1763-1766 (2005).

 Atomic-Scale View of Redox-Induced Reversible Changes to a Metal- Oxide Catalytic Surface: VOx / a-Fe2O3 (0001), C.-Y.  Kim, A. A. Escuadro, P. C. Stair, M. J. Bedzyk, J. Phys. Chem. C 111, 1874-1877 (2007).

Structure of rutile TiO2 (110) in water and 1 molal Rb+ at pH 12: Inter-relationship among surface charge, interfacial hydration structure, and substrate structural displacements Z. Zhang, P. Fenter, N.C. Sturchio, M.J. Bedzyk, M.L. Machesky, D.J.  Wesolowski,  Surf. Sci. 601, 1129-1143 (2007)

Nanoscale Structure of Self-Assembling Hybrid Materials of Inorganic and Electronically Active Organic Phases, M. Sofos, D.A. Stone D.K.  Goswami, J.S. Okasinski, H. Jin, M.J. Bedzyk, S.I. Stupp, J. Phys. Chem. C 112, 2881-2887, (2008).

Nanoscale piezoresponse of ferroelectric domains in epitaxial BiFeO3 nanostructures, S. Hong, J. A. Klug, M. Park, A. Imre, M. J. Bedzyk, K. No, A. Petford-Long and O. Auciello, J. Appl. Phys. 105, 061619 (2009).

 Nanoscale structure and morphology of atomic layer deposition platinum on SrTiO3 (001), S. T. Christensen, J. W. Elam, B. Lee, Z. Feng, M. J. Bedzyk and M. C. Hersam, Chem. Mater. 21 516-521 (2009).

 Probing Surface-Adlayer Conjugation on Organic-Modified Si(111) Surfaces with Microscopy, Scattering, Spectroscopy, and Density Functional Theory, J. A. Kellar, J.-C. Lin, J.-H. Kim, N. L. Yoder, K. H. Bevan, G. Y. Stokes, F. M. Geiger, S. T. Nguyen, M. J. Bedzyk and M. C. Hersam, J. Phys. Chem C 113, 2919-227 (2009).

 Controlled Growth of Platinum Nanoparticles on Strontium Titanate Nanocubes by Atomic Layer Deposition, S.T. Christensen, J.W. Elam, F.A. Rabuffetti, Q. Ma, S.J. Weigand, B. Lee, S. Seifert, P.C. Stair, K.R. Poeppelmeier, M.C. Hersam, M.J. Bedzyk, Small 5, 750-757 (2009).

 A Ferroelectric Oxide Made Directly on Silicon, M.P. Warusawithana, C. Cen, C.R. Sleasman, J.C. Woicik, Y. Li, L.F. Kourkoutis, J.A. Klug, H. Li, P. Ryan, L.-P. Wang, M. Bedzyk, D.A. Muller, L.-Q. Chen, J. Levy, D.G. Schlom, Science 324, 367-370 (2009).